Air pump for deep wells



Jan. 6, 1925.

Filed Jan. 24,

R.H.TUCKER AIR PUMP FOR DEEP WELLS df aw -1unzzzeu Patented Jan. 6, 1925.

PATENT OFFICE.

RALPH E. TUCKER, OF LOS ANGELES, CALIFORNIA.

AIR PUMP FOR DEEP WELLS.

Application filed January 24, 1924. Serial 1T0. 688,164.

To all whom it may concern:

Be it known that I. RALPH H. TUCKER, a

citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Air Pumps for Deep Wells, of which the followlng is a specification. My invention relates to air-driven pumps for deep wells and consists of the novel features herein shown, described and claimed.

An object of my invention is to make an air-driven pump for deep wells in which the well tubing is provided with a seat for the pump mechanism and the pump mechanism, including the cylinder, is connected to the air pipe to be lowered into the tubing and having a shoulder to rest upon the tubing seat and so that the entire pump mechanism may be removed by pulling up and removing the air pipe.

Other objects of my invention will appear from the drawing and specification.

Figure 1 is a vertical central section of a well and a well casing and an air-driven pump, embodying the principles of my invention.

Fig. 2 is a horizontal cross section on the line 2-2 of Fig. 1 and looking downwardly.

The lower end of the pump tube 1 is provided with a reducer coupling 2 having an internal beveled shoulder 3, and a smaller tube 4 is connected to the coupling 2 and extends downwardly.

The air pipe 5 is connected at its lower end to the upper hub 6. A spider 8 is screwed downwardly into the hub 6 before the pipe 5 is inserted and carries an adjusting screw 9 screw-seated through the spider and held in place by a jamb nut 10.

The lower hub 11 extends downwardly from the spider 8, and the piston cylinder 12 is screwed up into the hub 11 against the spider. I

A plate 13 is formed integral with the hubs 6 and 11 and has openings 14 arranged around the hubs, and has a beveled outer face 15 to engage the shoulder 3. An externally screw-threaded nipple 16 extends downwardly from the plate 13 and the pump oil cylinder 17 is screwed upon the nipple 16. A bushing 18 is screwed into the lower end of the oil cylinder 17 and has a beveled seat 19. valve has a beveled periphery to fit the seat The lower member 20 of the foot 19 and has a central opening 21, the upper end of the opening 21 being flared to receive the valve ball 22. An internally screwthreaded flange 23 extends upwardly from the member 20 and the spider ring 24 is screwed down into the flange 23.

Spider arms 25 extend upwardly and inwardly from the ring 24, and an internally screw-threaded hub 26 is formed at the upper inner ends of the arms 25. The piston rod 27 is screwed into the hub 26. The piston head 28 is slidingly mounted u on the piston rod 27 and has intake check va ves 29. The head 28 is externally screw-threaded and screwed into the end of the piston head cylinder 30, said cylinder 30 working in the oil cylinder 17 as a piston.

The air cylinder head 31 slides upon the piston rod 27 and is screwed into the oil piston head 28. The air piston 32 is mounted upon the upper end of the piston rod 27 and the air cylinder 33 fits the piston head 32 and is screwed upon the cylinder head 31,

there being an outlet check valve 34 near the lower end of the air cylinder 33 and there being .exhaust ports 35 near the upper end of the cylinder 33.

The exhaust port valve 36 is a ring slidingly mounted in the air cylinder 33 above the piston 32 in position to open and close the exhaust ports 35.

A second-air cylinder head 37 is screwed into the upper end of the air cylinder 33 and has a pipe 38.extendin upwardly and sliding in the piston cylin or 12. A bearing spider 39 is-mounted in the upper end of the pipe 38 and has a central bearing through which the stem 40 slides, and the stem 40 is screwed down into the central hub 41 carried by the valve 36, said hub 41 being connected to the ring by arms 42. A head 43 is mounted upon the upper end of the stem 40 in position to engage the screw- 9 when the oil piston goes up.

When the air cylinder 33 is down, as in Fig. 1, the piston 32 strikes the valve 36 and closes the exhaust ports 35. The valve 36 is tight-fit and is held by friction. At the upper end of the pipe 38 is a valve seat 44 and a valve 45 is formed upon the lower end of the head 43. A spider 46 is mounted in the pipe 38 below the valve seat 44 and has air ports and has a central bearing through which the steam 40 operates.

When the oilpiston 28 is down, as shown in Fig. 1, the air piston 32 closes the valve iii 36 relative to the exhaust ports 35 and raises the valve 45 oil the seat 44. Then air pressure coming down the pipe 5 past the spider S and through the cylinder 12, will enter the air expansion chamber 47 and the pressure against the piston 32, which is held stationary, will exert a similar pressure against the head 37 and raise the air cylinder 33, thereby raising the oil piston 28 and lifting the column of oil. When this operation has continued to near the limit, the head 43 will strike the screw 9 and-the valve 36 will be moved downwardly to open the ports 35, and the valve 45 will be closed upon the seat 44, thereby holding the air pressure and opening the exhaust ports 35. The weight of the oil piston 28 and cylinder 30, together with the parts attached thereto, will cause the head 37 to move toward the piston 32 until the valve 36 is again closed. Closing the valve 36 opens the valve 45 and admits the air pressure to the expansion chamber, and this operation is continued as long as sufficient air pressure-is supplied to the pipe 5.

than the exhaust ports 35 are open and the valve 45 seated, the air pressure is exerted against the upper end of the pipe 38 and the valve 45 to assist in lowering the oil piston 28 and other parts to their normal positions, reac y for another impulse. When, for any reason, the pump does not work, the whole pump mechanism may be withdrawn from the oil tube, as before suggested, by pulling up the air pipe 5.

Thus I have produced an air-driven-reciprocating pump comprising the combination with a pump tube having an inwardly extending supporting seat near its lower "end, of a supporting spider adapted to fit said seat, an oil pump cylinder extending downwardly. from the splder, a foot valve in the lower end of the oil pump cylinder, an oil piston in the oil pump. cylinder, a piston rod rigidly mounted and extending upwardly from the foot valve, an air cylinder extending upwardly from the oil piston, an air piston upon the upper end of the piston rod in the air cylinder, a reciprocating exhaust valve in the air cylinder, there being discharge ports controlled by the exhaust valve, a pipe extending upwardly from the air cylinder, a valve seat at the upper end of the pipe, a stem connected to the exhaust valve and extending upwardly through the pipe, a valve on the upper end of the stem to fit the valve seat, an air pipe extending downwardly and connected to the supporting spider, a cylinder extending downwardly in line with the air pipe and forming a piston joint with the pipe extending upwardly from the air cy inder, a stop spider at the lower end of the air pipe, and a head upon the upper end or the stem to engage the stop spider to operate the exhaust valve; all made up as a unit to be lowered into working position or removed therefrom by manipulating the air pipe.

Various changes may be made without departing from the spirit and scope of my invention as claimed.

I claim:

1. An air-driven reciprocating pump comprising the combination with a pump tube having an inwardly extending supporting seat near its lower end, of a sup orting spider adapted to fit said seat, an oi pump cylinder extending downwardly from the spider, a foot valve in the lowerend of the oil pump cylinder, an oil piston in the oil pump cylinder, a piston rod rigidly mounted and extending upwardly from the foot valve, an air cylinder extending upwardly from the oil piston, an air piston upon the upper end of the piston rod in the air cylinder, a reciprocating exhaust valve in the air cylinder, there being discharge ports controlled by the exhaust valve, a ipe extending upwardly from the air cylin er, a valve seat at the upper end of the pipe, a stem connected to the exhaust valve and extending upwardly through the pipe, a valve on the upper end of the stem to fit the valve seat, an air pipe extending downwardly and connected to the supporting spider, a cylinder extending downwardly in line with the air pipe and forming a piston joint with the pipe extending upwardly from the air cylinder, a stop spider at the lower end of the air pipe, and a head upon the upper end of the stem to engage the stop spider to operate the exhaust valve;- all made up as a unit to be lowered into working position or removed therefrom by manipulating the air pipe.

2. In an air-driven reciprocating pump, a supporting spider, an oil cylinder extending downwardly from the supporting spider, a foot valve in the lower end of the oil cylinder, an oil piston in the oil cylinder, a piston rod rigidly mounted and extending through the oil piston, an air cylinder extending upwardly from the oil piston, a piston upon the piston rod in the air cylinder, there being exhaust ports through the cylinder above the piston, a reciprocating valve for the exhaust ports to be operated one way by the piston, an air pipe connected to the supporting spider, a cylinder extending downwardly from the air pipe, a

pipe extending upwardly from the head of the air piston and forming a piston connection with the cylinder, a valve seatat the upper end of the last-mentioned ipe, a stem extending from the exhaust va ve through the valve seat, a valve upon the stem, and means for operating the two valves as the air cylinder reciprocates.

3. In an air-driven reciprocating pump, a reciprocating air cylinder having exhaust ports at. its upper end, a ring valve slidingly mounted in the cylinder to open and close the exhaust ports, a stationary piston in the air cylinder and adapted to close the exhaust valve, a telescoping connection between the air cylinder and an air pipe, a valve in the telescoping connection, a stem connecting the two valves together, and means for opening the exhaust valve and closing the other valve.

4. In an air-driven reciprocating pump, an air pipe, a stop at the lower end of the air pipe, a reciprocating air cylinder having exhaust ports in its upper end, a ring valve fitting tightly in the cylinder for! opening and closing the exhaust ports,- a stem extending upwardly from the ring valve, a pipe extending upwardly from the'cylinder around the stem, a valve seat at the upper. end of the pipe, a valve fitting the valve seat, and a stem connecting the two valves together so that when one is opened-the other is closed, and vice versa.

5. In an air-driven reciprocating pump, a supporting spider, an oil cylinder connected to the supporting spider, a foot valve in the lower end of the oilcylinder, an oil piston in the oil cylinder, an air piston rigidly mounted, an air cylinder connected to the oil piston and fitting the oil piston, there being exhaust ports at the upper end of the air cylinder, a telescoping air piston connection between the supporting spider and the air cylinder, means forming an air stopvalve, and means forming an exhaust valve, said valves being connected so that one is open when the other is closed and there being means for operating the valves.

In testimony whereof I have signed my name to this specification.

' RALPH H. TUCKER. 

